Device for opening bulbs closed by welding and their application to fire extinguishers



July .9 R. LEVINSON 1,919,848

DEVICE FOR OPENING BULBS CLOSED BY WELDING AND THEIR APPLICATION TO FIRE EXTINGUISHERS Filed Aug. 10, 1931 5,. fey/Ibsen 3 5 ing of the Patented July 25, was

STATES PATENT OFFICE i I I, YABIS, FRANCETABSIGNOB 130 50011723 ANONYHE: LB IONDIAL,

0F PU'IEAUZ, SEINE, IRAN DEVIUE non. @Pfi- BULBS CLOSED BY WELDING'AND mm APPLICATION 1'0 FIRE EXTINGUISHEES Application filled August 10, will, Serial Il'o. 558,294, and in France exact 18, 1930.

The present invention has for object a device intended to accelerate and facilitate the opening of bulbs made of lass or other material, for any use and close by welding,

5 for instance by closing their neck portlon with a blow-pipe. V it is to that, actually, bulbs of this find are opend by breaking the neck portion at a weakened part ofthe latter, and after having previousl made in this weakened part a supcrficia groove by means of an abrasive tool. Inefi'ecting this operation, it is necessary to take precautions for avoiding injuries and, particularly, 1t 18 prudent to protect ones' fingers by wrapping a cloth round them. In any case, the opening of a bulb in these conditions is never rapid and is often delicate.

The device forming the Subject matte'r of 20' this invention remedies these inconveniences.

It is mainly characterized by the combina tion of two elements so made as to limit the neck of the bulb to the breaking zone,

these elements be' acted upon for imparting to them a re create bending and shearing stresses on the neck of the bulb. v I

Such as defined in its p ciplqthe invention lends itself to venous orms of con- '30 struction which may difier from each other particularly:

By the nature of the means allowing to impart to both elements of the device the relative di lacements producing the breakbulb neck,

By the nature of the means the protection of the against injuries.

The-invention ,rticularly concerns the 40 following forms 0' construction, which, for

the moment, seem to be advantageous:

(a) One of the elements is constituted by a tube which'fits as exactly as possible on the neck of the bulb, the second" element is constituted by a ring also fitted on the bulb and the plane ofcontact of which with the adjacent edge of the tube deter- I mined the breaking zone of the neck, the provided with a gripping arm being 50. or ever which-is acted upon or mov ng it ensuring operators fingers ative displacement and.

towards the tube, and the latter protecting the fin%ers against injuries.

'(b) y way of constructional modifica-. tion of the device according to paragraph (a), the ring and the tube are joined to each other, the breakin zonebeing comprised in the empty space 1 tween the ring and the adjacent edge of the tube.

(0) Both elements are constituted by two rings provided at the ends of a tool in the form of shears, the two blades of which have been replaced by two rings which, preferably, have their two adjacent edges coated and movable in one and the same plane, the action exerted on the branches of the shears determining the breaking of the bulb neck circumscribed b the two rings, without the hand, which is at a suificient distance away, requiring special protecting means.

The inventionhas moreover specifically for object the ap lication of the invention to glass bulbs of re extin ishers, and particularly of a device accor in to paragraph (a) and in which the tubular element is closed atv its free end and permanently fits over the neckvof the unbroken bulb on which it is sealed by means of any suitable adhesive.

' The accompanying drawing illustrates, so by way of example only, two forms of construction of a device forming the subjectmatter of the-invention. I

Fig. 1 is an axialsection of a special bulb a for fire extinguishers, which is provided with an opening device. Figs. 2 and 3 are an elevation'and asectional side view of a constructional modification of the device.

. In the example illustrated in Fig. 1, the inclined neck 1 of the bulb 2 isclosed by means of a blow-pipe after this bulb has received its charge of 'fire-extinguishi liquid. On the closedneck, which is calibrated as regularly as possible, is fitted a ring 3, preferably made of metal, and provided with an armor-lever 4. On the neck 1 is then fitted a tubular cap 5. This ca p is permanently sealed on. the neck and the bulb is delivered with the two elements constituting the o nin device.

To open t e bu b by breaking the neck, it sufiices to move the arm 4 and the cap 5 towards each other with the fingers. ,Com-

bined bending and ,shearing stresses are generated in the plane of contact of the rmi 3 and ofthe edge of the cap, and the nec is neatly broken in this plane. It is obvious that the cap 5 protects the fingers against any injury by contact with the g ass. In the'form of construction illustrated in Figs. 2 and 3, the ring 3 and the cap 5 are jointed together at 6 to constitute a tool or new commercial product which, delivered with a series of closed bulbs, allowsone to instantaneously open the latter without taking any special precautions.

t is to be noted that the terms rings and tube or tubular cap employed in the foregoing, are not limitat ve. he rin can obviously present a discontinuitly an the tube can be apertured or replace bytwo or more shells, or by jaws the arrangement of which allows one to obtain the advanta eous commercial results indicatedabove. T e in-. vention defined in its principle in the preamble to the present specification includes.

in itssco any means and combinations of means al owing one to carry this principle into ractice.

at I claim as my invention and desire.

to secure by Letters Patent is:

Y 1. In a device forefiecting the o 85 bulbs made of glass or other material, closed by welding and capable-of containings any Eigducts and even of constituting bul for extinguishers, the combination of a tube ning of.

fitting as exactly as possible on the bulb neck, a ring also fitted on the bulb fieck and the plane of contact of which with the ad- Lacent edge of the tube, determines the re zone of the neck, and a gripping arm rigid with the said ring, aglrgted to be forced towards said tube to br the bulb neck without ,risk of injury to the hand of the user. I

2. In a device for efiecting the opening of bulbs made of glass or other material, closed by welding and capable of containing any roducts an even 0 constituting bulbs for re extinguishers the combination of a tube fitting as exactly as possible on the bulb neck, a ring pivoted to the end of the said tube and also fitting onthe bulb neck, and an arm rigid with the said ring the zone comprised between this ring and the corresponding end of the said tube beings-he breaking zone of the neck, this brea being obtained b forcing the said lever an tube towards eac other.

3. In a device for eflecting the opening of the bulbs of fire extinguishers, the combination with the said bulb, of a tubular element closed at one of its ends and rmanently fittin over the neck of the un roken bulb on w ch it is sealed by means of a suitable adhesive, an annular element surrounding the neck of the bulb in the region of the open end of the said tube, and a lever forming an extension of the said ring, said lever an tubular element being adapted to be forced together to break the bulb neck without risk 100 of injury to the hand of the user.

'BUVIN LEVINSON. 

